UR HELP IS VERY MUCH NEEDED I WAS VERY CONFUSED ON THIS. Match the following terms and definitions.

1.the smallest unit of an element
shell

2.the path surrounding the nucleus of an atom in which electrons are normally located

compound

3.the number of protons in the nucleus of the atom

neutron

4.a pure substance where atoms of two or more elements are chemically bonded to one another

diatomic

5.the positively charged center of an atom

atomic number

6.exists in orbit around the nucleus of an atom and carries a negative charge

molecule

7.the smallest unit of a pure substance that consists of two or more atoms held together by a chemical bond

atom

8.the mass of an element

atomic mass

9.a subatomic particle that carries no charge

nucleus

10.containing two atoms

proton

11.a subatomic particle with a positive charge

electron

shell

compound

neutron

diatomic

atomic number

molecule

atom

atomic mass

nucleus

proton

electron

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

List charasteristics of athenosphere